Filter



` Dec' 25,

E- S. STEPHENS FILTER l .Tv h s w J m 2mm n 2 g 1 j 92 2 002 Z 7 2 w a r2 S fm affww W W. L M2 4... .w j r ,an n.. n/ F /YH 7 .I )J 9 Deczs, 1928.`

2 Sheets-Sheet 2 FILTER E. s. STEPHENS f Filed May 2o. 1927 Patented Dec. 25, 192.8;

ELTON S. STEPHES, F CHICAGO, IIVILI'LIIZBTOIS.A

rmrnn.

Application led Hay 20,

The filter of the present invention is del signed primarily for the purpose of filtering oil delivered to a lubricating liquid, and the object of the inventionis to provide an extensive filtering surface within a' comparatively restricted compass, so that the filter device as a Whole may be made compact and easily detachable for use in the lubricating syst-emot a truck, automobile, or the like.

A further object of the invention isr to provide within the structure of the filter itself a' receptacle fora heaviergrade of lubricant which may be injected or charged into the system from time to time in order to boost la' the llubricant in'the system when thel same becomes unduly thinned out.

Further objects have to do with the construction and arrangement of the various portions of the device in such a way that the structure maybe readily assembled or disassembled as occasion may require.

In the drawing: Figure 1 is an elevation', partly in section, showing t-he filter of the present invention;

Fig. 2 is v'an end view of the lower end of the filter;

Fig. 2"".is a detail in section taken o n line 2 2 of Fig. 2;

Fig. 3 is across sectional' view taken on line. 3-3 of Fig. 1; and

Fig. 4, which shows a structure vgenerally ysimilar to Fig. 1 except for the omission of the force pump, is a vertical section taken centrally in the plane of line 2 2 of Fig. 2.

The filter as a whole comprises an outer elongated cylindrical 'shell- I0 which, at its lower end, is fitted into a base'plate 11 provided with a peripheral flange 12 and provided in'its center with a boss 13,.which lat,-l

ter serves toccnt'er and support an inner tubular wellf14 adapted to receive and' env close a cartridgey 1 5 containing Qthe heavy A lubricant intended to be charged into the sysf tem for boosting or thickening the same. The inner well affords' in effect' a central shell'leaving between the two an place. Surrounding the inner well is a cage near its upper and -lower ends with inwardly extending ring shaped lugsh A18 vwhich abut against the well and afford spacers'for main- K. taining the cage in spaced relation to themnerwell. i .A

The cylindrical wall 17 of the cage 1sl propost or pillar in' spaced relation to the outer annularl chamber 16 within which the filtering takes..

comprising a cylindrical wall 17 provided.

1927. serial No. 192,924.

vided on itsexterior with a'plurality of outwardly extendingv circumferential ribs 19, and at recurrent intervals the ribbed Wallof the shell is cut through by longitudinally 60, extending slots 20,- whiclrare of a depth tocut through the outstanding ribs, which later, however, are uncut at their outer edges so as to maintain the integrity of the cage as a whole. 'The upper and lower ribs 21 of the 65 lcage are but `slightly slotted to afford substantially unbroken ends for the cage, and each of these end'portions is provided with a longitudinally extending vertically disposed rlng shaped flange 22 which is grooved in its 70 A edge to provide a seat for a packing ring 23 of felt or other compressible material.

The lower end of the cage rests upon the base plate 11, the packing ring 23 being inter- Vposed to efiectually seal the parts at this point, while the upper end of the cage is clamped and positioned by the contact of a -ring shapedcap 24 provided `with'a flange 25 `V whichencircles the upper rim of theouter cylindrical shell, a gasket or packing ring 26 80 being interposed to effectually sealthe parts at this point. The ring cap 24 is provided f in its center with a bore 27 which provides :for the protrusion therethrough ofthe upper wall of the well 14, which protruding por- '85 tion is provided withvthreads 28.

' A locking ring 29 is threaded upon the threaded portion 28 'of the well wall and bears against a gland30, the compression ofV which serves to effectually seal -tlie cap against the well wall, and the ring also serves to force down the cap in such a wayas to effectively compress the packing rings-23 -and 26 and maintain the sealed` relation of the parts. It is desirable that the thickness or positioning of the respective sealing rings 23 and 26 be such that the ring 23- will be contacted by the inner face of the .cap 21 prior to the sealing contact made on the-ring 26,

so that as the'parts are ultimately drawn to 100' locked relation, the ring 231wil1be forcibly compressed to prevent leakage of oil Varound either end of. the filter-cage.

The upper threaded .end of the well-is l closed by means of a-langed cap 31 provided 105 in itscenter with an air inlet orifice which 'is surrounded. by an inwardly extending beveled lip 33 adapted to bearagainst the upper end 34 of the cartridge 15 which contains 'the Vthick charging lubricant, the arrangement no being such that as the cap 31 is screwed to y closi-ng position, the end of the cartridge i the orifice 32 to maintain a close seal at this point. After the loading of the cartridge, the end is perforated in register with the orifice 32 to provide for the admission of air as the contents of the cartridge are discharged. The base 11 atl its center is also provided with a discharge passage 35 surrounded by a rim 36, the purpose and arrangement of which is the same as that of the rim 33, which rim bears forcibly against lthe face of the cartridge and indents the same as indicated.

The convolute or accordion plaited filter tube A of suitable fabric. is carried recul'- rently over the outstanding rims or flanges 19 and intermediately down back into contact withthe Wall of the filter cage by the provision of ,draw cords or rings 37 of any suitable character, and the upper and lower ends of the filter tube may, if desired, be held in place by terminal loops, rings or cords 38.

The oil or lubricant to be filtered is admitted into the side wall of the casing through,

a fitting 38a with which is connected gauge 39, of any suitable character adapted to registerthe fluidity or viscosity`of the oil, and the oi] so admitted will enter the space outside of the filter tube (see Fig. 4). The oil after filtering is discharged through one or the other of two ports 40 located in the base of the structure-at such point as to communicate with the space intermediate between the vfilter tube and the center well, so that the oil after filtering may be circulated back and forth from the `space in question. Addi tional drain holes 40 may be provided in the base 13 for the chamber 16. Y

In the construction of Figs. land 2, the center discharge 'port 35 leading from the 'base of the Well communicates with a transversely extending piston chamber 41 formed in the interior of the transversel extending protuberant shell 42 integrally ormed with the base which is provided at one end with an outwardly extending flange 43 threaded on its interior to receive a gland 44 bearing against a packingring 45 which effects a Seal for a stem 46 of a plunger ring 47 which reciproca-tesl within the chamber 41. The plunger ring'47 carries an inwardly extending stem 48 which is cored to receive the stem 49 of a ta ered Avalve head 50, the inner side Ofwhich ears against the inwardly tapered face 51v of a plunger 52 provided with ports 53 extending longitudinally thereof.

The valve stem 49 is surrounded by a coil spring 54 which is interposed between the head 55 of the stem and a shoulder 56, the arrangement being such that the backward stroke of the plunger will permit a recession and opening of the valve head 50 and an admission of lubricant through the ports 53 into the annular space intermediate the plunger head 52 and the plunger ring 47,V while a forward thrust of the plunger as' a whole will close the valve 50 and force out a charge of lubricant through the valve controlled nipple 57, which lubricant thus discharged is injected into the oil circulating system to boost the quantity or thickness of the lubricant therein contained.

If' it is desired to employ'the center well as an additional or supplemental filter, instead of employing' itA as a container for a special kind of lubricant, the filter in the form shown in Fig. 4 may be employed. In this case, the wall instead of housing a cartridge is employed as a. container for layers 58 of suitable filtering material, and the wall of the well near the upper end thereof is provided with a plurality of perforations 59 constituting ports for educting the liquid from the space within the accordion plaited filtering tube to the filter space within the Well, and in this case the plunger pump is omitted, together with the ports 40, and the doublylfiltered oil is discharged through the orifice 35. In other respects, the arrangement shown in Fig. 4 is similar to that heretofore described. so that further description of thismodification is deemed unnecessary.

In operation, relatively thin oil admitted through the gauge fitting 38 will enter the space outside of thev accordion plaited or convoluted filtering tube andv will be drawn through the fabric thereof into the annular space exterior of the well, and the filtered oil 1s discharged and returned through the ports 40. The arrangement of the cage is such as to permit the'cage and the filtering fabric to be withdrawn as a unit from the casing by merely removing lthe upper cap which serves to clamp and hold the cage in position without the requirement for special means of attachment for the cage.

The cage is so arranged that it will be prop! erly centered by contact of the ring shaped lug-18 with the wall of the center well, which in turn is properly positioned and centered by its fit uponthe post 13upstanding from the base vl1. Where t-he center well is used. as a receptacle for heavy oil which may or may not, asdesiredf, be contained wit-hin the cartridge, the action of the force pum per-v mits measured charges of such. oil to e injected from time to time into the system. The gauge on the side of the casing also indi cates the back pressure when t-he fabric becomes dirty or clogged.

As the plunger is driven forward, the valve head 50, acting as the head of the plunger,

strainer or lwill drive outthe charge of heavy lubricant in advance ofthe valve head, and, atv the sameY time, open up the 'port 35 intoregister with the reduced portion of the valve surrounding the stem 48, thereby trapping a charge of oil between the ring 47. On drawing back the plunger, the oil so'trapped will pass through the ports 35 in the plunger head into the space in advance plunger head 52 and the plunger lau 'of the plunger head in preparation for the next succeeding forward thrust of the plunger. Withthe plunger drawn back to this final position, the plunger head 'will cut across the discharge port`35- thereb sealing.

thle latter against the further disc arge of o1 Where the center well is used for the retention of a supplemental filter, the plunger may be dispensed with and the entire space within the casing employed for filtering purposes. The device as a Whole is compact and self-contained, and the various parts are so arranged that they may be readily asseml interior and exterior ofthe cage, a convoluted .shaped ribs andthe wall of the ca provided with longitudinally extending slots filter tube recurrently distended by, contact with the edge of the ring shaped ribs,l means for holding the tube contracted within the spaces intermediate between the space of the ring shaped ribs, the filter being provided with inlet and outlet passages, one of which opens into the space exterior of the filter tube and one interior thereof, substantially as described. y

2. In a filter, the combination of a casing provided with a centrally disposed well, a lter cage of generally cylindrical formation held in spaced relation to the center well, the cage bein provided with outstanding ring 'shaped ri s and the wall of the cage being provided with longitudinally extending slots to provide communication etween the spaces interior and exterior of the cage, said slots also cutting part way through the ribs, a convoluted filter tube recurrently distended by contact with the'edge of the ring` shaped ribs, .means for holding the tube contracted within the spaces intermediate between the space of the ring shaped ribs, the filter being provided vwith'inlet and' outlet passages, one

l of which opens into @the space exterior of the filter tube and one interior thereof, substantially as described.

3. In alter, the combination of a casing provided with a centrally disposed well, a filter cage ofgenerally cylindrical formation held in spaced relation to the outer well, the cage being provided with outstanding ring being to provide communication between the spaces lnterior and exterior of the cage, a convoluted filter tube recurrently distended by con-- disposed well, av

tact with the edge of the ring shaped ribs,' -means for holding the tube contractedwithin the spaces intermediate between the space ofthe ring shaped rings, the filter being pro- 4. In a filterthe combination of a casing provided with a centrally disposed Well, a fil-v ter cage. of generally cylindrical formation held in spaced relation to the center well, the cage. being provided with outstanding ring shaped ribs and the wall of the cage being provided with longitudinally extending slots to provide communication between the spaces interior and exterior ofthe cage, said slots also cutting part Way through the ribs, a convoluted filter tube recurrently distended by contact with the edge of the ring shaped ribs, means for holding the tube contracted within the spaces intermediate between the space of the rin shaped ribs,the filter being provided with in et and outlet passages, one of which opens into the space exterior ofthe filter tube and one interior thereof, a force pump in communicationwith the centrally disposed well, and a closing cap for the opposite end of said well, substantially as described.

5. In a filter, the combination o-f a cylindrical casingand a cylindrical centrally disposed well, a ring shaped cap for the caslng through which the well protrudes, a nut screw threaded onto the protruding end of the well and bearing against the ring shaped cap, an 'outerv closing cap for the wel conslsting of a tubular body portion surrounding and in spaced relation to the well,

and a plurality'of ring shaped ribs, the-body and ribs being perforated by longitudinally extending slots, a convoluted filter tube of fabric recurrently distended by engagement with the edges of the, ring shaped ribs, and means contracting the tube intermediate the ribs, substantially as described.

6. In a filter, the combination of a cylindrical casingand a cylindrical` centrally disposed Well, a ring shaped cap for thel casing throu h which the well protrudes, al nut screw threa ed onto the protruding end of the well and bearing against the ring shaped cap, an

outer closing cap for the well, a base plate upon which the casing and well are both sup' tending slots, and the ends of the cage lbeing provided withl outwardly extending flanges a base `plate upon which the casing and well are both supported, a generally cylindrical filter cage the well and bearing aga-inst the ring shaped cap, an outer closing cap for the Well, a base plate upon which the casing and; well are both supported, a generally cylindrical filter cage consisting of a tubular body portion surrounding and in spaced relation to the well, a plurality of ring shaped ribs, the body and ribs bein perforated by longitudinally eX- tending s ots, a convoluted filter tube of fabric recurrently distended by engagement with the edges of the ring shaped ribs, means contracting the tube intermediate the ribs, and a force pump `carried below the base plate and incommunication with the interior of the well for injecting measured quantities of the contents of the well,'substantially as described.

8. In a filter, the 'combination of a cylindrical casing and a cylindrical centrally disposed well, a ring shaped cap for the casing through which the well protrudes, a nut screw threaded .onto the protruding end of the well and bearing against the ring shaped cap, an outer closing cap for the well, a base plate upon which the casing and well are both supported, a generally cylindrical filter cage consisting of a tubular body`portion surrounding and in spaced relation to the well, a plurality of ring shaped ribs, the body and ribs being perforated by longitudinally eX- tending slots, and the ends of the cage being provided with'outwardly extending flanges clamped vin sealedlrelation between t-he cap and base plate respectively, a convoluted filter tube of fabric recurrently distended by engagcment with the edges of the ring shaped ribs,means contracting the tube intermediate the ribs, and a force pump carried below the base plate and in communication with the interior of the well for injecting measured quantities of the contents of the \well, subst-antially as described.

9. In a filter, the combination of a cylindrical casing and a cylindrical centrally disposed well, a ring shaped cap for the casing through which the well protrudes, a. nut screw threaded onto the protruding end of the well and bearing against the ring shaped cap, an outer closing cap for the well, a base plate upon which the casing and well are both supported, a generall cylindrical filter cage consisting of a tu ular body portion surrounding and in spaced relation to the well, a plurality of ring shaped ribs, the body and ribs bein perforated by longitudinally extending s ots, a convoluted filter tube of fabric recurrently distended by engagement with the edges of the ring shaped ribs, Aand means contracting the tube intermediate the ribs, a gauge secured to the side of the casing and in communication with the interior thereof for indicating the condition of the'oil entering outside of the filtering tube and the base plate being provided with a portfor the discharge of the filtered'oil from the space intermediate the filtering tube and the well, substantially as described.

l0; In a filter, the combination of a cylindrical casing and a cylindrical centrally disposed well, a ring shaped cap for the casing through which the well protrudes, a nut screwthreaded onto the protruding end of the well and bearing against the ring shaped cap, an outer closing cap for the well, a base plate upon which the casing and well are both supported, a generally cylindrical filter cage `consisting of a tubular body portion surrounding and in spaced relation to the well, a plurality of ring shaped ribs, the body and ribs being perforated by lon itudinally extending slots, and the ends of the cage being provided with outwardly extending flanges clamped in sealed relation between the cap and base plate respectively, a convoluted filter tube of fabric recurrently disten-ded by engagement with the edges of the ring shaped ribs, and means contracting the tube intermediate the ribs, a gauge secured to the side of the casing and in communication with the interior thereof for indicating the condition of the oil entering outside of the filtering tube, and the base plate-being provided with a borel for the discharge of the filtered oil from the space intermediate-the filtering tube and the well, substantially as described.

11. In a filter, the combination of a cylindrical casing and a cylindrical centrally disposed well, a ring shaped cap for the casing through which the well protrudes, a nut screw threaded onto the protruding end of the well and bearing against the ring shaped cap, an

outer closing cap for the well, a base plate upon which the casing and Well are both Csupported, a generally cylindrical filter cage consisting of a tubular body portion surrounding and in spaced relation to the Well, a plurality of ring shaped ribs, the body Vand ribs being perforated by longitudinally extending slots,

a convoluted filter tube of'fabric recurrently distended by enga ement with the edges of the ring shaped ri s, means Vcontracting the tube intermediate the ribs, anda force pump carried below the base. plate and in communication with the interior of the well for injecting measured quantities of the contents of the well, a gauge secured to the side of the casing and in communication with the interior thereof for indicating the condition of the oil entering outside of the filtering tube, and the base plate being provided with a. port for the dischar e of the filtering oil from the space interme 'ate the lilter tube and the Well, substantially as describe 12. In a filter, the combination of a cylindrical casing and a cylindrical centrally disposed well, a ring shaped cap for the casing sisting of a tubular `body portion surround-- ing and in spaced relation to the well, a. plurality of ring shaped ribs, the body and ribs being perforated by longitudinally extending slots, andthe ends of the cage being pron vided with outwardly extending iianges clamped in sealed relation between the cap and base plate respectively, a convoluted filter tube of fabric recurrently distended by engagement with the edges of the ring shaped ribs, means contracting the tube intermediate the ribs, and a force pump carried below the base plate and in communication with the 4interior of the well for injecting measured quantities of the contents of the well, a gauge secured to the side of the casing and in communication with the interior thereof for indicating thc condition of the oil entering outside of the Iiltering tube, and the base plate being provided with a port for the discharge of the filtered oil from the space intermediate the filtering tube and the well, substantially as described.

ELTON S. STEPHENS. 

